Sewing machine



FIG. 1 is a side perspective view of the sewing machine;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in FIGS. 1-7 show environmental structure and form no part of the claimed design. 

The ornamental design for a sewing machine, as shown. 